LTE-WLAN Aggregation via IP Flow Splitting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LTE-WLAN aggregation systems face inefficiencies due to interference in unlicensed spectra and complex signaling, leading to suboptimal resource utilization and increased battery consumption, especially when handling both LTE and WiFi connections simultaneously.
Innovation Solution
Implementing IP flow splitting and dual-connection support in user equipment (UE) devices, allowing simultaneous activation of both LTE and WiFi interfaces with separate IP addresses, and using IPsec tunneling for secure WiFi communication, while prioritizing channel conditions to optimize data transmission between LTE and WiFi networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE-WLAN aggregation is implemented to increase data throughput, then network bandwidth is improved, but device complexity and battery consumption increase
Solution Approach 1:
The patent segments the aggregation system into two distinct modes: PDCP layer aggregation where both LTE and WLAN packets are processed through the PDCP protocol stack, and IP layer aggregation where WLAN packets bypass PDCP and are handled at the IP layer. This segmentation allows the system to choose the appropriate aggregation mode based on specific requirements, reducing unnecessary complexity while maintaining high throughput capabilities.
2Reliability
If simultaneous LTE and WiFi connections are maintained for aggregation, then network reliability is improved, but resource utilization deteriorates due to interference in unlicensed spectrum
Solution Approach 1:
The patent implements dynamic connection management where the device can flexibly switch between maintaining simultaneous LTE and WLAN connections or using only LTE based on real-time conditions. The system dynamically adjusts the aggregation mode (PDCP layer vs IP layer) and can deactivate WLAN when interference is detected or when LTE alone suffices, optimizing both reliability and energy consumption according to current network conditions.
3Ease of operation
If complex signaling is used to coordinate LTE and WiFi aggregation, then aggregation control is improved, but processing efficiency deteriorates
Solution Approach 1:
The patent extracts the complex PDCP layer processing requirements from the IP layer aggregation path. In IP layer aggregation mode, WLAN packets bypass the complex PDCP protocol stack and are handled directly at the IP layer, significantly reducing processing overhead and signaling complexity while maintaining aggregation functionality. This extraction allows simpler processing for scenarios that don't require PDCP-level coordination.
Data Source
AI summary
The present disclosure is directed to methods and system for managing communication of packets. A transceiver node receives a plurality of IP data packets from an internet protocol (IP) network. The transceiver node separates the IP data packets into a first set and a second set of IP data packets, according to channel conditions of a cellular network and a wireless local area network (WLAN). The transceiver node transmits, to a user device, the first set of IP data packets using a cellular network protocol of the cellular network and the second set of IP data packets using a WLAN protocol of the WLAN, causing the user device to aggregate the first set of IP data packets transmitted using the cellular network protocol with the second set of IP data packets transmitted using the WLAN protocol.